Lecture 29 - Gravity Drained Tank Application

Lecture 29 puts together many of the concepts and techniques from block diagram algebra. We use the gravity drained tank of the Unit Operations lab to work through an example problem.

  • As a first step, we derive a transfer function that relates inlet valve position to tank level. This is derived using an overall material balance.
  • Next, we construct an overall closed-loop transfer function that relates changes in setpoints to the resulting response of the level.
  • Finally, the overall transfer function is put into a 2nd order response form. This allows us to analyze stability, oscillations, and other aspects of the closed loop response.
  • Lecture 29 Notes
  • Lecture 29 Worksheet

Homework

  1. Course reading for next class: none
  2. Assignment due by the start of Lecture #30: none

Relate each problem in the context of the overall course objectives.


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